In iOS 15, unit and currency conversions are handled by Spotlight, but in iOS 16 you can perform these and many other unit conversions anywhere in the operating system that you can select text. Keep reading to learn how it works.

ios 16 lock screen feature
Apple hasn't publicized this handy feature, but ‌iOS 16‌ is capable of performing a range of unit conversions that appear in inline text on the fly. The built-in ability is on call across a range of stock apps like Messages, Mail, Calendar, Notes, Reminders, and more, and is available at a touch of the screen.

For example, say you're in the U.S. and you're chatting via Messages with someone in the United Kingdom, and they mention the temperature where they are in degrees Celsius.

messages
There's no need to exit the app or even ask Siri to convert it to Fahrenheit for you – simply long press the underlined temperature in the chat bubble, and you'll see a pop-over that gives you the conversion (along with Kelvin, in case you were wondering) along with the option to copy it to the clipboard.

Here's another example. Let's say you receive an email in the Mail app from someone based in the U.S. country, informing you of a product event announcement that is due to take place at 10:00 a.m. PT. All you have to do is long press on the underlined time and iOS will provide you with the equivalent time in the time zone that your iPhone is set to, along with the option to add a Calendar event.

mail
In fact, ‌iOS 16‌ can work its conversion magic on a range of units including the following:

  • Currency
  • Distance
  • Temperature
  • Time Zones
  • Volume
  • Weight

So whenever you see underlined units in Apple's latest mobile OS, remember that a long press will very likely give you the conversion that makes most sense to you. (Credit goes to MacStories editor in chief Federico Viticci for spotting the feature.)

Popular Stories

iPhone 15 Pro Buttons CAD Leak

iPhone 15 Pro Leak Reveals Unified Volume Button and Mute Button

Monday March 20, 2023 8:33 am PDT by
As previously rumored, the next-generation iPhone 15 Pro and iPhone 15 Pro Max will feature a unified volume button and a mute button, according to leaked CAD images shared in a video on the Chinese version of TikTok and posted to Twitter by ShrimpApplePro. Instead of separate buttons for volume up and volume down, the iPhone 15 Pro models are expected to have a single elongated button for...
original iphone auction

Factory-Sealed Original iPhone Sells for $55,000 at Auction

Friday March 17, 2023 1:08 pm PDT by
A first-generation iPhone still sealed inside its box sold for $54,904 at auction, which is more than $54,000 over the original $599 price tag of the device when it was released in 2007. The original iPhone was put up for sale by RR Auction on behalf of a former Apple employee who purchased it back when it first came out. Back in February, an original, sealed iPhone sold for over $63,000,...
iPhone 12 Pro vs iPhone 15 Pro Feature

iPhone 12 Pro vs. 15 Pro: New Features to Expect if You've Waited to Upgrade

Friday March 17, 2023 10:29 am PDT by
While year-over-year iPhone upgrades are not always groundbreaking, new features can begin to stack up over multiple generations. For example, the iPhone 15 Pro will be a notable upgrade for those who still have a three-year-old iPhone 12 Pro. If you are still using an iPhone 12 Pro and are considering upgrading to the iPhone 15 Pro when it launches later this year, we have put together a...
top stories 18mar2023

Top Stories: iPhone 15 Pro Pricing, New iOS 16.4 Beta, Siri vs. ChatGPT, and More

Saturday March 18, 2023 6:00 am PDT by
Apple's high-end iPhone models have started at $999 in the U.S. since they first launched back in 2017 with the iPhone X, but could this finally be the year that starting price sees an increase? This week also saw some more rumors about Apple's upcoming headset and the company's explorations in the booming AI industry as well as the release of a new round of beta updates, so read on for all...
iPhone 15 Pro Mock Feature Buttonless

iPhone 15 Pro Max to 'Break Record' for Thinnest Bezels on a Smartphone

Friday March 17, 2023 2:59 am PDT by
The iPhone 15 Pro Max will have the thinnest bezels of any smartphone, beating the record currently held by the Xiaomi 13. That's according to the leaker known as "Ice Universe," who has divulged accurate information about Apple's plans in the past. Both iPhone 15 Pro models are expected to have thinner, curved bezels compared to the iPhone 14 Pro, potentially resulting in an Apple...
iphone 14 pro max deep purple feature purple

iPhone 15 Pro Launching This Year With These 11 New Features

Monday March 13, 2023 6:47 am PDT by
While the iPhone 15 lineup is around six months away, there have already been plenty of rumors about the devices. Many new features and changes are expected for the iPhone 15 Pro models in particular, including a titanium frame and more. Below, we have recapped 11 features rumored for iPhone 15 Pro models that are not expected to be available on the standard iPhone 15 and iPhone 15 Plus:A17...
iOS 16

iOS 16.4 for iPhone Nearing Launch With These 5 New Features

Monday March 20, 2023 11:50 am PDT by
Apple continues to test iOS 16.4, which includes a handful of new features and changes for the iPhone. Below, we have recapped five new features coming with the software update, including new emoji, push notifications from websites, and more. Apple says iOS 16.4 will be available in the spring, which begins today. In his newsletter this weekend, Bloomberg's Mark Gurman said the update should ...